Find the surface area
A hemisphere with diameter 70 cm
here we are given diameter = 70
first of all we find radius = 70/2 = 35
now we apply the formula to find hemisphere
if it is open like a bowl then curved surface area 2Π r^2
surface area 2* 22/7* (35)^2 = 7700 cm^2
If it is a closed hemisphere
then surface area = 3 *22/7* (35)^2= 11550 cm^2
The figure is= a hemisphere
The diameter is= 70
Half the diameter is= 70/2~ 35
If it is a closed hemisphere:
S.A.= 3(3.14)(35)^2
S.A.=3(3.14)(1,225)
S.A.=3,675(3.14)
S.A.=11,539.5~ round up to
S.A.=11,540
SA of whole sphere = 4π(35)^2 = 4900π
so half of that is 2450π cm^2
A hemisphere with diameter 70cm
A hemisphere with diameter 70 cm
65
To find the surface area of a hemisphere, you need to know its diameter. The formula for the surface area of a hemisphere is:
Surface Area = 2πr^2.
Given that the diameter of the hemisphere is 70 cm, we can find the radius (r) by dividing the diameter by 2:
r = diameter / 2 = 70 cm / 2 = 35 cm.
Now we can substitute the value of the radius into the formula to find the surface area:
Surface Area = 2π(35 cm)^2.
Calculating this expression would give us the final answer for the surface area of the hemisphere.